CN217435864U - Rear floor assembly and vehicle - Google Patents

Abstract

The utility model discloses a back floor assembly and vehicle, back floor assembly, include: at least one stringer; at least one crossbeam, the crossbeam with longeron mutually perpendicular, the crossbeam with the junction of longeron is provided with transition connecting portion, transition connecting portion include: the first step is arranged above the second step, and the projections of the first step and the second step on the horizontal plane are both arc-shaped. The formability of the part is improved through the two layers of steps and the excessive form of the large circular arc, the strength and the rigidity of the part are enhanced through the forming characteristics, the strength of the integral connecting structure of the rear floor assembly structure is high, the torsional rigidity of the whole vehicle can be effectively improved, the welding process is reduced, and the precision of the part is improved, so that the development period is shortened.

Description

Rear floor assembly and vehicle

Technical Field

The utility model belongs to the technical field of back floor technique and specifically relates to a back floor assembly and vehicle are related to.

Background

The automobile rear floor is an important part of an automobile body, and the rear floor assembly is used as a bearing structure for bearing structures such as an automobile rear seat, a trunk and the like, has very high requirements on performances such as torsional rigidity, strength durability and the like, and plays an important role in automobile rear collision.

In the related art, the existing vehicle rear floor assembly is formed by welding a plurality of parts, and has low structural strength and poor torsion resistance. The manufacturing process is complex, and a plurality of sets of dies and welding fixtures are needed to complete the welding of the framework.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a back floor assembly sets up first step and second step through the junction at crossbeam and longeron, can strengthen the intensity and the rigidity of back floor assembly like this for the overall connection structure intensity of back floor assembly structure is high.

The utility model also provides a vehicle.

According to the utility model discloses back floor assembly of first aspect embodiment, back floor assembly, include: at least one stringer; at least one crossbeam, the crossbeam with longeron mutually perpendicular, the crossbeam with the junction of longeron is provided with transition connecting portion, transition connecting portion include: the first step is arranged above the second step, and the projections of the first step and the second step on the horizontal plane are both arc-shaped.

According to the utility model discloses back floor assembly promotes the formability of part with two-layer step, the excessive form of orthodrome, strengthens part intensity and rigidity through the molding characteristic for the bulk connection structural strength of back floor assembly structure is high, can effectively improve whole car torsional rigidity, reduces welding process, promotes the reduction development cycle of part precision.

According to some embodiments of the invention, the radius of the first step is smaller than the radius of the second step.

According to the utility model discloses a some embodiments, the longeron is two and divide into left longeron and right longeron, the crossbeam is two and divide into front beam and back crossbeam, a left side longeron the front beam right longeron with the back crossbeam connects gradually and is formed with the fretwork hole, the transition connecting portion set up in the extreme angle department in fretwork hole.

According to the utility model discloses a some embodiments, left side longeron the front beam right side longeron with the back beam orientation one side in fretwork hole all is provided with the turn-ups, the bottom of second step with the turn-ups is connected.

According to the utility model discloses a some embodiments, the turn-ups of front beam with be provided with the groove of dodging that a plurality of intervals set up on the turn-ups of rear frame member.

According to some embodiments of the present invention, the rear floor assembly is an integrally formed structure; or the left longitudinal beam, the front cross beam, the right longitudinal beam and the rear cross beam are welded with each other.

According to some embodiments of the invention, the wall thickness of the rear floor assembly is uniform; or the wall thicknesses of the left longitudinal beam and the right longitudinal beam are consistent, the wall thicknesses of the front cross beam and the rear cross beam are consistent, and the wall thicknesses of the left longitudinal beam and the rear cross beam are inconsistent.

According to some embodiments of the present invention, the wall thickness of the left longitudinal beam is h1, the wall thickness of the rear cross beam is h2, and h1 and h2 satisfy the relation: h1 is more than 1.1mm and less than 1.3mm, h2 is more than 0.9mm and less than 1.1mm, and h1 is more than h 2.

According to some embodiments of the invention, the rear floor assembly, be provided with at least one lightening hole on the rear cross beam.

According to the utility model discloses the vehicle of second aspect embodiment, including the frame; the rear floor assembly is fixedly connected with the frame.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a side view of a rear floor assembly according to an embodiment of the present invention;

FIG. 2 is a top view of a rear floor assembly according to an embodiment of the present invention;

fig. 3 is a left rear view of a rear floor assembly according to an embodiment of the present invention.

Reference numerals:

100. a rear floor assembly;

10. a stringer; 11. a left stringer; 12. a right stringer;

20. a cross beam; 21. a front cross member; 22. a rear cross member;

30. a transition connection; 31. a first step; 32. a second step;

40. hollowing out holes;

50. flanging; 51. an avoidance groove;

60. and (7) lightening holes.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

Referring to fig. 1-3, a rear floor assembly 100 according to an embodiment of the present invention is described, and a vehicle having the rear floor assembly 100 is also provided.

Referring to fig. 1 to 3, a rear floor assembly 100 according to an embodiment of the present invention includes: at least one longitudinal beam 10 and at least one transverse beam 20, the transverse beam 20 and the longitudinal beam 10 being perpendicular to each other. The longitudinal beams 10 are parallel to the longitudinal direction of the vehicle, the transverse beams 20 are parallel to the transverse direction of the vehicle, and the longitudinal beams 10 and the transverse beams 20 are perpendicular to each other. And, the rear half of the longitudinal beam 10 is slightly higher than the front side, and is inclined with the horizontal plane, this is because the rear floor assembly 100 needs to undertake the transmission of structural force during rear collision through the longitudinal beam 10 structure, so the rear of the rear floor assembly 100 is as the energy-absorbing structure, the longer the energy-absorbing structure, the better the energy-absorbing effect, the inclined design can keep the structural length, thereby guarantee the energy-absorbing effect, also can reduce the length of the rear floor assembly 100 structure, reduce the vehicle body floor area.

And, as shown in fig. 1, a transition connection portion 30 is provided at a connection portion between the cross beam 20 and the longitudinal beam 10, and the transition connection portion 30 includes: the first step 31 is arranged above the second step 32, and the projections of the first step 31 and the second step 32 on the horizontal plane are both arc-shaped. That is to say, the junction design of crossbeam 20 and longeron 10 has two-layer steps to two-layer step is first step 31 and second step 32 respectively, and wherein, first step 31 sets up in the top of second step 32, makes the whole connection structure intensity of structure of rear floor assembly 100 high like this, can effectively improve whole car torsional rigidity, and the NVH performance of whole car is better.

Furthermore, the first step 31 and the second step 32 are both designed in the shape of a circular arc, i.e. the projections on the horizontal plane are both arc-shaped. The circular arc-shaped corner design forms a smooth connecting part, and compared with a quadrilateral corner part, the circular arc-shaped corner is easier to form and simpler to manufacture.

From this, set up first step 31 and second step 32 through the junction at crossbeam 20 and longeron 10, can strengthen back floor assembly 100's intensity and rigidity like this for the overall connection structure intensity of back floor assembly 100 structure is high, makes the overall connection structure intensity of back floor assembly 100 structure high, can effectively improve whole car torsional rigidity, reduces welding processes, promotes the reduction development cycle of part precision.

Referring to fig. 2 and 2, in the rear floor assembly 100 according to the embodiment of the present invention, the radius of the first step 31 is smaller than that of the second step 32. The first step 31 is located on the upper side of the second step 32, and the radius of the first step 31 is smaller than that of the second step 32, because the rear floor assembly 100 is used as a bearing structure for bearing structures such as a rear seat and a trunk of an automobile, that is, the rear seat and the trunk of the automobile are both required to be placed on the upper side of the rear floor assembly 100, and the radius of the first step 31 is smaller than that of the second step 32, so that when other mounting structures are placed, the first step 31 is used as a connecting part, and the structure of the automobile body after mounting is tighter.

According to fig. 1 and fig. 2, the utility model discloses rear floor assembly 100, longeron 10 can be two to two longerons 10 divide into left longeron 11 and right longeron 12, and crossbeam 20 can be two, and two crossbeams 20 divide into front beam 21 and rear beam 22, left longeron 11, front beam 21 right longeron 12 and rear beam 22 connect gradually and are formed with fretwork hole 40, and transition connecting portion 30 sets up in the end angle department of fretwork hole 40. That is, there may be two longitudinal beams 10, which are respectively a left longitudinal beam 11, a right longitudinal beam 12, and two transverse beams 20, the transverse beam 20 is divided into a front transverse beam 21 and a rear transverse beam 22, the front transverse beam 21 is vertically connected to the front side of the left longitudinal beam 11 and is vertically connected to the front side of the right longitudinal beam 12, the rear transverse beam 22 is vertically connected to the rear side of the left longitudinal beam 11 and is vertically connected to the rear side of the right longitudinal beam 12, and the connection portion is the transition connection portion 30. And the front cross beam 21 and the rear cross beam 22, the left longitudinal beam 11 and the right longitudinal beam 12 are formed with hollow holes 40, the hollow holes 40 are rectangular, and the end corners are rounded corners, namely the transition connecting portions 30.

So, the junction of left longeron 11 and front beam 21 and rear beam 22 all is provided with first step 31 and second step 32 to and, the junction of right longeron 12 and front beam 21 and rear beam 22 all is provided with first step 31 and second step 32, makes back floor assembly 100 when forming a whole like this, and back floor assembly 100's structure monolithic joining structural strength is high, can effectively improve whole car torsional rigidity.

As shown in fig. 1 and fig. 2, the rear floor assembly 100 of the embodiment of the present invention, the left longitudinal beam 11, the front cross beam 21, the right longitudinal beam 12 and the rear cross beam 22 are all provided with the turned-over edge 50 toward one side of the hollow hole 40, and the bottom of the second step 32 is connected with the turned-over edge 50. Left side longeron 11, front beam 21, right side longeron 12 and rear beam 22 all are provided with turn-ups 50 towards one side of fretwork hole 40, the design is because rear floor assembly 100 is the load structure who bears structures such as car rear seat and trunk, car rear seat and trunk all need place the upside at rear floor assembly 100, when placing other mounting structure, turn-ups 50 act as a linking position, make the installation easier, it is inseparabler to connect, turn-ups 50 can also act as the bearing position, there is certain effect of lifting, promote rear floor assembly 100's bearing capacity.

Wherein, the both sides of front beam 21 and rear beam 22 all are provided with turn-ups 50, so, all set up turn-ups 50 through the both sides at front beam 21 and rear beam 22, can promote the structural stability of front beam 21 and rear beam 22 like this.

As shown in fig. 2 and fig. 3, the rear floor assembly 100 according to the embodiment of the present invention is provided with a plurality of avoiding grooves 51 disposed at intervals on the flanges 50 of the front beam 21 and the flanges 50 of the rear beam 22. That is to say, the flanges 50 at the front side and the rear side of the front cross beam 21 and the rear cross beam 22 are further provided with a plurality of avoiding grooves 51, and the avoiding grooves 51 are arranged at intervals, on one hand, when the automobile seat and the trunk are installed, the avoiding grooves 51 play a role of avoiding the installation structures, and when the automobile seat and the trunk are installed, air chambers may appear where the automobile seat and the trunk are installed, so that the resistance is received in the installation, and the installation is not tight enough, so that the avoiding grooves 51 can avoid the situation; on the other hand, the relief groove 51 can also reinforce the strength of the front cross member 21 and the rear cross member 22, so that the structural strength of the rear floor assembly 100 is higher.

Referring to fig. 1-3, a rear floor assembly 100 according to an embodiment of the present invention is an integrally formed structure. The rear floor assembly 100 can be an integrally formed structure and formed by stamping a plate, so that the welding processes of the rear floor assembly 100 can be reduced, the labor is correspondingly reduced, and the cost is reduced.

Or, the rear floor assembly 100 according to the embodiment of the present invention is formed as a whole by welding the front cross member 21 and the rear cross member 22 with the left longitudinal member 11 and the right longitudinal member 12. Therefore, the front cross beam 21 and the rear cross beam 22 are welded with the left longitudinal beam 11 and the rear cross beam 22 by using the laser tailor-welding technology, and compared with the traditional welding technology, the rear floor assembly 100 obtained by laser tailor-welding has firmer and tighter joints and stronger stability.

Referring to fig. 1-3, a rear floor assembly 100 according to an embodiment of the present invention has a uniform wall thickness. If an integrally formed structure is adopted and the rear floor assembly 100 is formed by stamping a plate, the wall thickness of each part of the obtained rear floor assembly 100 is consistent, so that the rear floor assembly 100 can be conveniently formed, the processing efficiency of the rear floor assembly 100 is effectively improved, and the production cost of the rear floor assembly 100 can be saved.

Or, when the front cross member 21 and the rear cross member 22 are welded to the left longitudinal member 11 and the right longitudinal member 12 by using the laser tailor welding technique, the wall thicknesses of the left longitudinal member 11 and the right longitudinal member 12 are the same, the wall thicknesses of the front cross member 21 and the rear cross member 22 are the same, and the wall thicknesses of the left longitudinal member 11 and the rear cross member 22 are not the same, that is, the wall thickness of the cross member 20 is not the same as the wall thickness of the longitudinal member 10. Thus, the structure of the longitudinal beam 10 can be reinforced in a targeted manner, and the torsional rigidity of the whole vehicle can be effectively improved.

Specifically, in the rear floor assembly 100 of the embodiment of the present invention, the wall thickness of the left longitudinal beam 11 is h1, the wall thickness of the rear cross beam 22 is h2, and h1 and h2 satisfy the following relation: h1 is more than 1.1mm and less than 1.3mm, h2 is more than 0.9mm and less than 1.1mm, and h1 is more than h 2. Since the longitudinal beam 10 structure is required to bear not only the weight of the rear seat and the trunk of the automobile but also the force of a rear collision in the entire rear floor assembly 100 structure. The rear floor assembly 100 needs to transmit the structural force during the rear collision through the rear cross beam 10, so that the design needs to ensure that the whole structure has enough bearing capacity, and the thickness of the longitudinal beam 10 needs to be increased, so as to ensure that the rear floor assembly 100 has enough capacity to bear the collision force when the automobile is subjected to the rear collision.

Referring to fig. 3, the rear cross member 22 is provided with at least one lightening hole 60. In the whole structure of the rear floor assembly 100, in practical application, the main bearing parts are the left longitudinal beam 11 and the right longitudinal beam 12 and the rear half part of the rear floor assembly 100, and the weight of the structure of the rear floor assembly 100 can be reduced by the design of the lightening holes 60, so that a lighter and more flexible structure is obtained. And the lightening holes 60 are approximately oval, two ends of each lightening hole are arc-shaped, and two sides of each lightening hole are straight lines.

According to the utility model discloses vehicle of second aspect embodiment includes: a rear floor assembly 100 of the vehicle; and, a frame; the rear floor assembly 100 is fixedly connected with the vehicle frame. Therefore, the utility model discloses in the rear floor assembly of vehicle, the junction of left longeron 11 and front beam 21 and rear beam 22 all is provided with first step 31 and second step 32 to and, the junction of right longeron 12 and front beam 21 and rear beam 22 all is provided with first step 31 and second step 32, makes rear floor assembly 100 when forming a whole like this, and rear floor assembly 100's structure monolithic joining structural strength is high, can effectively improve whole car torsional rigidity.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A rear floor assembly, comprising:

at least one longitudinal beam (10);

at least one crossbeam (20), crossbeam (20) and longeron (10) mutually perpendicular, the junction of crossbeam (20) and longeron (10) is provided with transition connecting portion (30), transition connecting portion (30) include: the novel folding table comprises a first step (31) and a second step (32), wherein the first step (31) is arranged above the second step (32), and the projections of the first step (31) and the second step (32) on the horizontal plane are arc-shaped.

2. The rear floor assembly according to claim 1, wherein the radius of the first step (31) is smaller than the radius of the second step (32).

3. The rear floor assembly according to claim 1, wherein the longitudinal beams (10) are two and divided into a left longitudinal beam (11) and a right longitudinal beam (12), the cross beams (20) are two and divided into a front cross beam (21) and a rear cross beam (22), the left longitudinal beam (11), the front cross beam (21), the right longitudinal beam (12) and the rear cross beam (22) are sequentially connected and formed with a hollow hole (40), and the transition connecting portion (30) is arranged at an end corner of the hollow hole (40).

4. The rear floor assembly according to claim 3, characterized in that the side of the left longitudinal beam (11), the front cross beam (21), the right longitudinal beam (12) and the rear cross beam (22) facing the through hole (40) are provided with flanges (50), and the bottom of the second step (32) is connected with the flanges (50).

5. The rear floor assembly according to claim 4, characterized in that a plurality of spaced-apart avoiding grooves (51) are provided on the flanges (50) of the front cross member (21) and the flanges (50) of the rear cross member (22).

6. The rear floor assembly of claim 3, wherein the rear floor assembly (100) is of unitary construction; or the like, or, alternatively,

the left longitudinal beam (11), the front cross beam (21), the right longitudinal beam (12) and the rear cross beam (22) are welded with each other.

7. The rear floor assembly of claim 3, wherein the rear floor assembly (100) has a uniform wall thickness; or the like, or, alternatively,

the wall thicknesses of the left longitudinal beam (11) and the right longitudinal beam (12) are consistent, the wall thicknesses of the front cross beam (21) and the rear cross beam (22) are consistent, and the wall thicknesses of the left longitudinal beam (11) and the rear cross beam (22) are inconsistent.

8. Rear floor assembly according to claim 7, characterized in that the wall thickness of the left longitudinal beam (11) is h1, the wall thickness of the rear transverse beam (22) is h2, h1 and h2 satisfy the relation: h1 is more than 1.1mm and less than 1.3mm, h2 is more than 0.9mm and less than 1.1mm, and h1 is more than h 2.

9. Rear floor assembly according to claim 3, characterized in that the rear cross member (22) is provided with at least one lightening hole (60).

10. A vehicle, characterized by comprising:

a frame;

the rear floor assembly (100) of any of claims 1-9, said rear floor assembly (100) being fixedly connected to said vehicle frame.

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